Bolt-threading machine.



No. 673,559.- l Patented May 7,1901.

c. LANz. BOLTTHREADING MACHINE.-

5 Shasta-Sheet l.v

(No Model.)

No. 673,559. Patented May 7, I90I. C. LANZ.

BLT THREADlNG MACHINE.

(Application filed Aug. 14 1899.).

5 Sheets-Shouf 2.

(Nnlodel.)

TW/m/ ma Hemus Pneus ca, rnomumq.. WASHINGTON, D. c.

No. 673,559. Patented May?, |90l.

c. LANz. son Tum-:Amma MACHINE,

(Applicltion filed Angl 14, 1899.,

5 Sheetsfshoet 3.

(No Model.)

'me Nonni: mins co. mmoumo. wumulmn, u. c.

Patentednay 7,'19ol.

'r Nb; 673,559.

C. LANZ.' BOLT THREADING MACHINE.

(Application led Aug'. l14, 1899.) y(No Model.) 5 Sheets-ShnefA.

THE ucnms Evans ce vnooumo.. wAsmNnmu, n. c.

No. 673,559. Patented May 7, `l90l.

C.: LANZ.

BOLT THEADING MACHINE.

y (Application led Aug. 14, 1899.) (No Model.) 5 Sheets-Shed 5.

. very laborious.

place the bolts in the carriage and remove` UNITED STATES ATENT- FFICE.

CHARLES LANZ, OF PITTSBURG, PENNSYLVANIA.

BOLT-TAHREADING MACHINE.

SPECIFICATION forming part of Letters Patent No. 673,559, dated May 7,190i.

Application filed August 14,1899. Serial No. 727,161. .No model.)

and State of Pennsylvania, have invented av new and useful ImprovementinBolt-Threading Machines; and I do hereby declare the following to be afull, clear, and exact description thereof.

Myinvention relates to machines for threading bolts, its object being tomake the work automatic, overcoming much of the manual labor required inthe ordinary bolt-machines,V and so providing for the more rapid runningof the machines and for increasing the output thereof. The ordinarymachine for threading bolts contains a rotating head carrying thethreading-dies, in front of which is a sliding carriage in which thebolt is placed, and it was required that the feeder after placing thebolt on the carriage would press forward the carriage with sufcientforce to hold the bolt up to the threading dies until they grasped thesame, after which the dies would draw the bolt in with them as theyrotated around the end thereof in the threading operation and would openautomatically when the threading was completed; but it required t heworkman to withdraw the sliding carriage, take out the threaded bolt,insert another in the holder, and press forward the carriage and hold ituntil the dies would engage that bolt. This required time and made thework By the present invention practically all these operations areovercome, the only necessity being for the workman to them therefromwhen the threading is completed.

The invention comprises certain improvements which will be hereinaftermore particularly described, including spring mechanism for drawingforward the carriage to feed theA bolt into the threading-dies andcertain tripping mechanism which when withdrawing the cone which closesthe threading-dies operat-es` also through certain mechanism and areciprocating pusher to push forward the carlriage and lock it in itsforward position, so

- that the workman is only required to withdraw a bolt, feed another inits place, and

through a lever trip the mechanism, so as to free the spring mechanismto draw the bolt forward into the threading-dies. The special points ofinvention desired to be covered will be more specifically set forth inthe claims.

To enable others skilled in the art to make and use myinvention, I willdescribe the same more fully, referring to the accompanying drawings, inwhich- Figure l is a top or plan view of the machine. Fig. 2 is a sideview looking at it from one side. Fig. 3 is a side view looking at itfrom the other side. Fig. 4 is in part a front view and in part asectional view showing the position of the mechanism, and Figs. 5 to 7are details showing the operation of the particular mechanism involved.

Like letters indicate like parts in each of the figures.

The machine has the ordinary table or frame A, having bearings a, inwhich is mounted the shaft b, carrying the threading-dies c, which areof the ordinary construction and do not need any particular description.In front of said threading-dies is the sliding carriage d, which carriesthe bolt-holder d and for long bolts has at the forward end a guide d2,the bolt resting in the holder d' and being supported in the guide d2centrally of the threading-dies, so that as said dies rotatecontinuously they can operate upon the frontend of the bolt. The diesare held in levers c', properly mounted on the shaft b, so as to beclosed by the cone e sliding on the shaft h, the dies being opened bythe spring e', extending around the rear ends of the die-levers c' andholding them in contact with the cone e and opening up their forwardends when the cone is withdrawn.

The parts forming the driving mechanism are well known and need butlittle description. The machine is intended for the cutting of twobolts, being a double machine, as shown in the front view, Fig. 4, andindicated in the top View, Fig. 1, the power from the overhead pulleys'Bbeing carried by a belt to the pulleys B' on the shaft h, which bypinion b2 and gear-wheel b3 rotates the shaft b to drive each threader.The apparatus is illustrated as having mounted abovethe machine aseparate shaft, which carries a pulley F', driven by a separate beltfrom the main power-shaft and having at its forward end the crank F2,which engages with the reciprocating rod F3, extending down to the bodyof the machine and connecting to the crankf, which is mounted in thebearing f' on the machine-body and has the depending pushing-arm f2,carrying a lug or pin f3, this arm being continuously reciprocated atrather a slow speed for the purposes hereinafter described. Thereciprocating motion may be applied to the pusher in any suitable way.Mounted at one side of the machine and extending forward and connectedto the carriage d is the strap h, the forward end of which may heconnected to the carriage at any suitable position by means of a seriesof bolt-holes, as at h', in its free end, through which the bolt h2passes into the carriage, this strap h extending toward the rear of themachine and being p'ivotally connected to the crank-arm t, mounted onthe m-achine-body at i' and having a short arm i2, which connects to therod t3, passing through the bearing t4 on the machine-frame, the springi5 fitting around the rod is and being confined between the bearing t4and the nut t, screwing on the upper end of the rod t3, so providing anadjustable spring connection, serving through the spring t5, crank t',and strap h to draw the carriage d toward the threading-dies and feedthe boltto be threaded into the same, the spring t5 providing thenecessary pressure to hold the bolt upV to the dies until they bite uponthe same and draw it in by their own action, and thev spring` alsoserving during this threading action, by the press-ure applied to the'bolt, to canse the saine regular and even feeding of the same tothethreading-dies and to relieve said dies from the strain of draw-A ing inthe bolt when it is connected to the bolt-carriage. Tostart the movementof the bolt-carriage after a bolt is inserted therein, the strap h alsocarries the spring trippinglever k, which is mounted on the strap at la'and carries the pawl k2, which can engage either with the' machine-frameor the; seat in a plate k3, adjustably secured to the' machineframe.Mounted also on the strap h is the bent ar'm le, which passes through aneye' Z55 on the' lever 7c and carries the spring 7t,wl1ich is compressedbetween said eye 165 and thenut k7, and therefore serves te hold thepawl kzin the sea-t or notch in th'eplate los', by which the strap h andcarriage (l are held in withdrawn position until the lever lo is pulledback, withdrawing the lug k2 from the notch in the plate 7c3, when thespring mechanism pulling on' the bar h will advance the carriage tolbring th'ebo'lt into the'die. This same stra-ph carries the gage-bar Z,which is secured in the hlockl' and' can he adjusted ac coi-ding to thedifferent lengths of thread or of bolt to be operated on. The gage-barthas its forward end bent, as at Z2, and is so adjusted that when thedesired portion of the bolt has been threaded it will strike against thelower end of the tripping-dog m, which is carried upon the maincone-lever n. This cone-lever n is mounted in the main frame at n andcarries the cone-arm n2, which engages with the collar of the cone andso irnparts forward or backward movement to the same, the cone-leveralso having the elbowarm n3, passing through a lug n4 on theinachine-frame and carrying a spring n, confined by the nut n, so thatwhen the conelever is tripped and released, as is to be described, itwill draw back the cone and open the threading-'dies In order to tripand release the cone-lever, as shown in the enlarged view, Fig. 7, thegage-arm Z contacts with the tripping-dog m, mounted on' the cone-leverand having the rearwardly-extending lug m2 provided with a sea-t for thelower end of the rod m3, the upper end of said rodl passing through thelug m4, so that when said dog is pushed hack the rod m3 will risethroughsaid lug and' in so doing will strike against and lift the dogp,- whichV is pivoted to' the maf chine-frameatp', and engageswit-li'the conelever to hold it in its advanced position, closing thethreading-dies. lt will be evident that by means of such mechanism whenthe gage Z strikes the dogm and through the bar m3 raises the pivoteddog p the spring ns (drawing on theY conele\'fer) draws out the cone, soopening the dies, leaving, however,

-the carriage in its advanced position, with the bolt within theA openthreading-dies.

I will now describe the mechanism for withdrawing the carriage', so'vthat the bolt may be lifted therefrom and another fed to the inachine. v

Formed on the machine-frameis a-vertical guideway r', in which ismounted a sliding bar r, the' upper end of this sliding bar above theguideway being form-ed cylindrical and l carrying the` spring r2, whichpresses against a lug r3, extending out from the machineframe, thespring r2 being confined between said lug 73 and the hand-n ut r4. rIhisspring naturally holds the bar r in raised position, as shown in Fig. 2,and said bar has the pin m5 at is lower end, on which rests the arm s,

`which is pivoted at its forward end to the bearing s, carried on thestrap h, and extends back through said bearing over the pin T5, beingsupported by said pin and normally i held in raised position, asshown inFig. 2, so

that as the pushing-lever f is reciprocated, as

' ab'ove described, this pinfs on its depending arm f2 will not contactwith thev arm s, but will swing under' the same until the arm s islowered far enough to bring the forked end s2 of the arm s into linewith the pin f3 of the elbow-lever f, ywhen (as said elbow-lever iscontinuously reciprocated through the mechanisln above described) theelbow-lever will push forward the arm s, and with it the strap IOO IIO

h, against the pressure of the spring mechanism operating through theelbow-lever i, and will thereby force both the strap h and thebolt-carriage d forward until the pawl k2 engages with the seat or notchin the plate k3 and holds the carriage in forward position. As shown inFigs. 2 and 6, the cone-lever n carries thereon the wedge t, pivoted onsaid lever and extending back under the lug r3 of the machine-frame. Thewedge t has the horizontal upper edge t, contacting with the lug frs,and the inclined lower edge t2, contacting with the inclined plate t3upon the sliding bar r. When therefore the gage Z operates through thetripping-dog m and bar 'm3 to raise the pivoted dog p, leaving theconelever free to be withdrawn by the spring a5, said spring draws backthe wedge-piece t, forcing it under the lug r3, and so forcingdownwardly the sliding bar r, thus permitting the forked arm s, restingon the pin rof said sliding bar, to be lowered into the course of thereciprocating elbow-lever f, so said lever will push forward the forkedarm, and with it the main strap or body t and the boltcarriage, as abovedescribed. To force the cone of the threading-dies forward and closesuch threading-dies after the threaded bolt has been withdrawn, Iprovide the bearing on the strap h with the adjustable lug u, whichstrikes upon the pin u' on the conelever n and forces said lever forwardagainst the pressure of the spring m5, so forcing the cone c in betweenthe sections of the threading-die and closing the same, the cone-leverbeing forced forward by said lug until the pivoted dog p on themachine-frame engages with said cone-lever and holds it in its advancedposition, so bringing all the parts back into position for the nextthreading operation.

I will now recapitulate the operation of threading bolts, so that it maybe clearly undei-stood. The operator simply places the bolt in thebolt-holder d of the carriage d and trips the lever k, when the springt5, operating upon the crank-arm t' and through the strap h, draws' thecarriage forward and exerts the necessary pressure to feed the bolt intothe dies. The revolving dies then cut the thread upon the bolt, thisoperation continuing until the gage-bar Z strikes the tripping-dog lmand raises the pivoted dog f and frees the cone-lever fn, when thespring a5 draws back the cone-lever, so drawing back the cone andopening the threading-dies. At the same time the wedge 1f, carried bythe cone-lever, passes under the lug r3 and depresses the sliding bar r,so lowering the forked arm s in position to engage with thepushing-lever f, which pushes forward said forked arm, and with itpushes forward the strap h against the force of the spring i5, soretracting the bolt-carriage d and drawing the bolt from thethreading-dies, the strap and carriage being retracted until thetripping-lever la engages with the seat in the plate k3 of or attachedto the machine-frame, holding the bolt-carriage in its retractedposition. In this retracting movement of the strap h its lug u, carriedon the bearing s', strikes against the pin u' on the cone-lever andforces the cone-lever and cone forward against the pressure ofthe springa5 until the conelever is engaged by the tripping-dog@ and the parts arebrought back into position. The manual work in connection with themachine is therefore reduced to the placing of the bolt in thebolt-holder, the tripping of the lever 7e, and the removal of thethreaded bolt, and the ordinary operator can attend to twice the numberof threading-machines than has heretofore been found practicable whereit was necessary forhim to manually operate the bolt carriage in feedingit to and withdrawing it from the threading-dies.

What I claim as my invention, and desire to secure by Letters Patent,is-

l. In bolt-threading apparatus, the combi- I nation of threading-dies, asliding bolt carriage, spring mechanism for advancing the same,continuously-reciprocating pushing mechanism, and means acted on by saidpushing mechanism for retracting the carriage, substantially as setforth.

2. In bolt-threading apparatus, the combination of threading-dies, asliding bolt-carriage, spring mechanism for advancing the same andcontinuously-reciprocating pushing mechanism for retracting thecarriage, substantially as set forth.

3. In bolt-threading apparatus, the combination of threading-dies, asliding bolt-carriage, spring mechanism for advancing the same,continuouslyreciprocating pushing mechanism and a swinging arm adaptedto be brought into line with such pushing mechanism and thereby retractthe carriage, and tripping mechanism carried by the carriage to causethe movement of said swinging arm, substantially as set forth.

4:. ln bolt-threading apparatus, the combination of threading-dies, anda cone for opening and closing the saine, a sliding carriage, springmechanism for advancing the same, and continuously reciprocating pushingmechanism for retracting the carriage and advancing the cone to closethe dies.

5. In bolt-threading apparatus, the combination of threadingdies, abolt-carriage, mechanism for advancing the same carrying a pivoted arm,and continuously-reciproeating pushing mechanism, and means for loweringsaid arm into line with the pushing mechanism.

6. A bolt threading mechanism having threading-dies and a cone-operatinglever in combination with withdrawing mechanism for said lever, apivoted dog engaging with the lever and holding the threading diesclosed, a bolt-carriage and a gage thereon engaging with trippingmechanism for releasing ICO IIO

the cone-lever, a backwardly-extending retracting-arm connected to thecone-lever and a spring engaging therewith to retract the cone-lever.

7. A bolt threading mechanism having threading-dies and a cone-operatinglever in combination With withdrawing mechanism for said lever, apivoted dog engaging with the lever and holding the threading diesclosed, a bolt-carriage and a gage thereon engaging with trippingmechanism for releasing the cone-lever, a backWardly-extendingretracting-arm connected to the cone-lever and a spring engagingtherewith to retract the cone-lever, the backwardly-extending armpassing through a lug in the machine-frame and carrying the springconfined between said lug and a nut at the end ofthe arm.

8. A bolt threading mechanism having threading-dies and a cone-operatinglever in combination with withdrawing mechanism for said lever, apivoted dog engaging with the lever and holdingI the threading diesclosed, a bolt-carriage and a gage thereon engaging with trippingmechanism for releasing the cone-lever, a tripping-dog .carried by thecone-lever, a stop on lthe cone-lever, a rod operated thereby Aandpassing through the stop to raise the pivoteddog and free the conelever.

9. In bolt-threading apparatus, the combination of threading-dies, asliding bolt-carriage having a strap extending back therefrom andconnected to spring mechanism for advancing the carriage, an arm pivotedto said strap, a vertically-.sliding bar supporting said arm, andcontinuously reciprocating pushing mechanism and means for lowering saidbar and thereby bringing the arm in line with the pushing mechanism.

l0. In bolt-threading apparatus, the combination of threading-dies, asliding bolt-carriage having a strap extending back therefrom andconnected to spring mechanism for advancing the carriage, an arm pivotedtov said strap, a vertically-sliding bar supporting said arm, andcontinuously-reciprocating? pushing mechanism, and a Wedge engaging withand depressing said bar so as to bring the forked arm in line withthevpushing mechanism.

ll; In bolt-threading apparatus, the combination of threading-dies, asliding bolt-carriage having a strap extending back theref from andconnected to spring mechanism for advancing the carriage, an arm pivotedto said strap, a verticallysliding bar supporting said arm, andcontinuously reciprocating pushing mechanism and means for lowering saidbar and thereby bringing the arm in line with the pushing mechanism, anda cone-operated lever carrying a wedge engaging with and depressing saidbar so as to bring the forked arm in line With the pushing mechanism.

12. In bolt-threading apparatus,the combination of threading-dies, asliding bolt-carriage having a strap extending back therefrom andconnected to spring mechanism for advancing the carriage, an arm pivotedto said strap, a vertically-sliding bar supporting said arm, andcontinuously reciprocating pushing mechanism and means for lowering saidbarand thereby bringing the arm in line with the pushing mechanism, anda cone-operated lever carrying a wedge engaging with and depressing saidbar so as to bring the arm in line with the pushing mechanism, andmechanism for tripping the cone-lever and drawing it back.

13. In a bolt-threadin g apparatus,a continuouslyreciprocating pushingmechanism rin combination with a Vforked arm, the sliding bar r passingthrough the lug r3 on the machine-frame and carrying a spring above thesame, and having the lug T5 supporting the forked arm and the wedge t'engaging with said,` lug and adapted to depress the sliding bar.

I4, In bolt-threading apparatus, the combination of threading-dies, acone, cone-operating lever having a pin thereon, a bolt-car riage havinga strap connected to advancing mechanism and carrying a lug and pushingmechanism adapted to retract said strap and thereby through said lug andpin force the cone into the threading-dies and close the same.

15. In bolt-threading apparatus, the combination of threading-dies, acone, coneoperating lever having a pin thereon, a bolt-carriage having astrap connected to advancing mechanism and carrying a lug and pushingmechanism adapted to retract said strap and thereby through said lug andpin force the cone into the threading-dies and close the same, and apivoted dog engaging with the cone-lever to hold the cone in closedposition.

16. In bolt-threading apparatus, the combination of threading-dies, asliding carriage connected to advancing mechanism, and a pushing-levermounted on the machine-frame and adapted to engage with and retract thecarriage, and a continuously-operating pitman connected to thepushing-lever to impart continuous reciprocating motion thereto.

v17. In bolt-threading apparatus, the combination. of threading-dies, asliding carriage connected to advancing mechanism, and a pushing-levermounted on the machine-frame and adapted to engage with Aand retract thecarriage, and a pitman connected to the pushing-lever toimpartcontinuous reciprocating motion thereto, and a crank connected tosaid pitman and turned by mechanism independent of the machine,substantially as set forth.

18. In bolt-threading apparatus, the combination of threading-dies, asliding carriage, carriageadvancing mechanism connected thereto, apusher for retracting the carriage IOO IIO

and a spring-lever on the carriage for hoidable seat on themachine-frame with which ing it in withdrawn position. said spring-leverengages. Io 19. In bolt-threadingapparatus, the combi- In testimonywhereof I, the said CHARLES nation of threading-dies, a slidingcarriage, LANZ, have hereunto set my hand.

carriage -advancing mechanism connected CHARLES LANZ.

thereto, a pusher' for retreating the carriage Witnesses:

and :t spring-lever on the carriage for ho1d- GRACE C. RAYMOND,

ing it in Withdrawn position, and an adjnst- ROBERT C. TOTTEN.

